Step-by-step explanation:
A number of students prepared for an examination. Arts, Religion and sculpture. Out of this number, 15 took arts, 20 took religi
1 answer:
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The second term of the expansion is .
Solution:
Given expression:
To find the second term of the expansion.
Using Binomial theorem,
Here, a = a and b = –b
Substitute i = 0, we get
Substitute i = 1, we get
Substitute i = 2, we get
Substitute i = 3, we get
Substitute i = 4, we get
Therefore,
Hence the second term of the expansion is .
Answer: 31.25%
Step-by-step explanation: To answer the question <em>what percent of 80 is 25</em>, we translate the question into an equation.
So we have "what percent" that's x, "of 80" means times 80, "is 25" = 25.
Now to solve for <em>x</em>, since <em>x</em> is being multiplied by 80, we need to divide by 80 on both sides of the equation. On the left side of the equation the 80's cancel and we have <em>x</em> and on the right side of the equation, we have 25 ÷ 80 which gives us 0<em>.</em>3125. Now, remember that we want to right our answer as a percent so to write 0.3125 as a percent, we move the decimal point 2 places to the right and we get 31.25%.
Therefore, 31.25% of 80 is 25.
